Materials commonly used in fireworks: 14. Properties of titanium powder

Fourteen, titanium powder properties

English name titanium; molecular formula for Ti, molecular weight of 47.90.This article comes from: https://fireworkslit.com/Fireworkslit-https://fireworkslit.com/materials-commonly-used-in-fireworks-14-properties-of-titanium-powder/

1. Physical and chemical properties. Appearance and properties: dark grey or black shiny amorphous powder: melting point: 1720 ° C; boiling point: 3530 ° C: relative density (water = 1): 4.5; minimum ignition energy: 10 MJ; solubility: insoluble in water, soluble in hydrofluoric acid, nitric acid, concentrated sulfuric acid.
2. Health Hazard. Irritating to upper respiratory tract after inhalation, causing coughing, tightness or pain in the chest.
3. Hazardous Characteristics. This product is flammable and irritating. Titanium metal dust is explosive and will burn and explode when exposed to heat, open flame or chemical reaction. Its powder is highly chemically active and can spontaneously combust in air. Titanium metal can not only burn in air, but also in carbon dioxide or nitrogen. It is easy to chemically combine with halogen, oxygen, sulfur and nitrogen at high temperature.
4. Emergency treatment of leakage. Isolate the leakage contaminated area and restrict the exit of people. Cut off the source of ignition. It is recommended that emergency personnel wear dust masks (full face masks), wear anti-virus clothing, and do not come into direct contact with the leak. Small amount of leakage: Avoid raising dust, use clean shovel to collect in dry, clean and covered containers, transfer for recycling. Large amount of leakage: cover with plastic sheet, canvas, etc., use non-sparking tools to transfer and recycle.
5. Fire extinguishing methods. Use dry powder, dry sand, etc. to extinguish the fire. It is strictly prohibited to use water, foam, carbon dioxide, etc. to extinguish the fire, high heat or intense combustion, water extinguishing may cause an explosion.

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Basic introduction

Titanium powder, hydrogenated titanium powder: Purity: 95-99.4% and other specifications Properties: Titanium powder: the product is silver grey irregular powder, there is a large gas absorption capacity, high temperature or spark conditions flammable. Hydrogenated titanium powder: the product is black grey irregular powder. Usage: Titanium powder and hydrogenated titanium powder is a kind of metal powder with wide usage. It is powder metallurgy, alloy material additives. It is also an important raw material for metal ceramics, surface coating agent, aluminium alloy additive, electric vacuum suction agent, spraying and plating. Also used in aerospace, spraying, metallurgy, fireworks and other industries Particle size: -40 mesh to -300 mesh.

Loose packing density: 1.2-1.6 (g/cm3)

Performance

Chemical composition

Mainly refers to the content of the metal and the content of the magazine components, the higher the content of titanium in the titanium powder, the lower the content of impurities is relatively, then the purity of titanium powder is also higher, the higher the grade. For titanium powder metallurgy, the gas content of impurities, especially oxygen, has a great impact on the product. High-quality titanium powder, often the lowest oxygen content, so the advantages and disadvantages of titanium powder is often dependent on the amount of oxygen content.

Physical Pro

pertiesThis article comes from: https://fireworkslit.com/Fireworkslit-https://fireworkslit.com/materials-commonly-used-in-fireworks-14-properties-of-titanium-powder/

Titanium powder is more active than titanium metal, more likely to react with other elements or compounds, more likely to oxidise, flammable, explosive, and belongs to dangerous goods. Titanium and titanium alloy powder is usually light grey in colour, deepening as the particle size becomes smaller, coarse powder with a metallic luster, micropowder is grey, and ultra-fine powder is black. (1) The shape of the powder The shape of the powder particles is determined by the powder industry, different particle shapes have a great impact on the performance of the powder metallurgy process, which directly affects the strength of the product. For the production of porous titanium, it also directly affects the permeability of porous titanium and the uniformity of permeability. Therefore, in order to improve the pore uniformity and permeability of porous titanium material and hope to use spherical powder. (2) The specific surface of the powder particles The size of the specific surface directly affects the powder's pressing performance and sintering performance, the natural specific surface of the titanium powder pressing performance and sintering performance are better, the size of the specific surface of the powder and particle size, shape and appearance of the shape. The finer the particle size of the powder, the more complex the shape, the appearance of the more rough and porous, the larger the specific surface area of the particles; and vice versa. (3) The true density of the powder The true density of the powder refers to the density of the particles, including the closed pore pores, the true density of the powder and the different powder manufacturing process, but also with the content of the oxide. Usually it is slightly smaller than the density of its metal.

Powder Processing

(1) Hot Isostatic Pressing (HIP); (2) Powder Forging (DF); (3) Combustion Synthesis (CS); (4) Rapid Solidification (RSR); (5) Mechanical Alloying (MA); (6) Titanium Powder Laser Forming; (7) Metallic Powder Injection Moulding (MIM); (8) Rapid Overall Compacting.